[Amps] ALPHAs and momentary power outages

[Jim Brown]

On Mon, 16 Jul 2007 16:17:09 -0400, Tom W8JI wrote:

>Everyone better be careful here.

Tom is right, of course. 

BUT: let's not lose track of the original problem, which is SHORT 
(a few seconds) interruptions of mains power that cause the Alpha's 
filament timer to reset. Paul's major concern is not the 2 seconds 
loss of transmitting time, but rather the loss of 3 minutes (and his 
run frequency) while the timer resets. 

A reasonably robust "standby" UPS certainly SHOULD be able to hold 
up the filament and low voltage supplies for a few seconds (or even 
a few minutes) IF the amp is not transmitting, thus preventing the 
reset. 

A simple interlock that locked out KEYING the amp when the UPS is 
running (or even a smart operator) should prevent the very real 
problems that Tom has outlined.

73, 

Jim Brown K9YC